Error:

warning: date() It is not safe to rely on the system's timezone settings.  You are *required* to use the date.timezone setting or the date_default_timezone_set() function.  In case you used any of those methods and you are still getting this warning, you most likely misspelled the timezone identified.  We selected 'America/Los_Angeles' for 'PST/-8.0/noDST' instead in...

Whats up?

Drupal 6 and PHP 5.3 throws this particular error, it is fixed by the following steps:

1. Open php.ini
2. Edit date.timezone
3. Reload apache

There was some discussion on Drupal.org that for Drupal 7 a fix may be included when it is release.